EP0262844A2 - Signalisierungseinrichtung - Google Patents
Signalisierungseinrichtung Download PDFInfo
- Publication number
- EP0262844A2 EP0262844A2 EP87308293A EP87308293A EP0262844A2 EP 0262844 A2 EP0262844 A2 EP 0262844A2 EP 87308293 A EP87308293 A EP 87308293A EP 87308293 A EP87308293 A EP 87308293A EP 0262844 A2 EP0262844 A2 EP 0262844A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- signalling device
- active material
- housing
- magnetic element
- signalling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L5/00—Local operating mechanisms for points or track-mounted scotch-blocks; Visible or audible signals; Local operating mechanisms for visible or audible signals
- B61L5/20—Audible signals, e.g. detonator audible signalling
- B61L5/203—Detonators; Track mounting means; Composition of the detonative product
Definitions
- the present invention relates to signalling devices and in particular to impact detonated devices for use in railway track signalling.
- Railway track signalling devices are adapted to be placed upon a rail where advancing wheels of a rail vehicle such as a train will produce impact detonation of the devices resulting in an audible and/or visible signal. Such signals are employed in warning train crews of approaching trains.
- a signalling device suitable for attachment to a ferrous railway track and adapted to be detonated upon impact, said device comprising: an active material adapted for detonation upon being impacted; at least one magnetic element for attachment to said track; and means securing the magnetic element to said active material.
- the means of securing the magnetic element to the active material may comprise a housing.
- the housing may enclose at least a portion of the active material adapted for detonation.
- the housing may be formed from any suitable material such as plastics.
- the housing preferably is substantially combustible upon detonation of the active material housed therein.
- the housing may be bright coloured to improve its visibility.
- the housing may comprise a blister package.
- the blister package may be of any convenient shape or size.
- the blister package may include a cavity for retaining the active material.
- the package preferably is substantially symmetrical in shape. In one form the blister package may be substantially cup-shaped.
- the blister package may include a substantially circular major surface. The major surface may have diameter approx. 38 mm.
- the blister package may include a substantially cylindrical or truncated conical side wall. The side wall may be approximately 38 mm in diameter and may have a height approximately 10 mm.
- the blister package may include a flange portion.
- the flange portion may be substantially annular. The flange portion may depend outwardly from the side wall of the package.
- the flange portion may have an outer diameter approximately 48 mm.
- the active material may comprise a low grade explosive.
- the active material may comprise a friction sensitive composition.
- the composition may be adapted for detonation upon being subjected to a predetermined force or mechanical pressure.
- the composition preferably is arranged such that it will not detonate when attached to a steel rail and impacted by a steel weight approximately 11.3 kg. and having a hemispherical striking surface approximately 75 mm radius of curvature when the weight is dropped from a height less than 200 mm.
- the composition preferably is arranged such that it will detonate when the steel weight is dropped from a height 400 mm or greater.
- the active material preferably is arranged such that it will detonate by passage of a rail vehicle of 5 tonne minimum axle load.
- the active material preferably is such that upon detonation it will register no less than 150 db peak sound level measured 6 metres from the source at a distance 1.2 to 1.5 metres above source level with the microphone pointed in direction of the source.
- the active material may additionally or alternatively be arranged to produce a flash and/or smoke signal upon detonation. This may be useful to warn train crews in fog and/or storm conditions.
- the magnetic element may be attached to the housing in any suitable manner.
- the magnetic element is bonded to the flange portion of the blister package.
- the magnetic element may be adapted to seal the active material within the cavity of the blister package or housing.
- the magnetic element preferably is resilient.
- a resilient magnetic element improves adhesion qualities of the signalling device because it conforms more easily to a track surface.
- a resilient magnetic element also enhances the capacity of the signalling device to pass safety tests associated with bulk storage of the warning devices.
- the magnetic element may comprise magnetic sheet material.
- the sheet material may comprise rare earth cobalt.
- the sheet material may additionally comprise rubber.
- the signalling device of the present invention resists skidding because movement of the magnetic element over a conducting surface induces eddy currents in the surface which in turn set up a magnetic force opposing movement of the magnetic element.
- the magnetic element of the signalling device of the present invention thus produces dynamic braking action which acts to resist movement of the device when attached to a rail or similar surface.
- the signalling device shown in Figs. 1-2 includes a housing 10 comprising a moulded plastics blister cup including a major surface portion 11, a truncated conical side wall portion 12 and an annular flange portion 13 depending from side wall portion 12.
- the housing 10 comprises thermal plastics material such as polyethylene or polypropelene.
- Major surface portion 11 is approximately 38 mm in diameter and side wall portion 12 is approximately 10 mm high and 38 mm in diameter.
- Flange portion 13 has an outer diameter approximately 48 mm and an inner diameter approximately 38 mm.
- the housing 10 of the signalling device contains an active material 14.
- the active material 14 comprises a friction sensitive composition which will detonate at least upon passage of a rail vehicle of 5 tonne minimum axle load.
- the active material 14 when detonated is adapted to produce a sound level no less than 150 db linear peak measured in accordance with the procedure disclosed herein.
- the active material 14 is sealed within housing 10 via a base member 15.
- Base member 15 is bonded to flange portion 13 of housing 10 via any suitable bonding agent such as pressure sensitive adhesive.
- the adhesive is such that it prevents ingress of water into the cavity of the housing containing the friction sensitive composition 14.
- Base member 15 comprises a sheet of magnetic rubber such as rare earth cobalt.
- the sheet of rubber is approximately 48 mm in diameter and approximately 1 mm thick.
- the signalling device of the present invention has been successfully tested under passenger and freight trains travelling at high (100-115 kph), low (10-30 kph) and very low ( ⁇ 5 kph) speeds on straight and curved tracks.
- the device has also been successfully tested under a variety of rail conditions including dry and wet rail, rail contaminated with oil, water or detergent and sanded and worn rail.
- Tests for signal track adherence during rail vibration have also been accomplished by use of 'super series' locomotive running at maximum power and at slow speed.
- the rail signalling device of the present invention has been found to operate successfully at temperatures at least as low as -20°C and as high as +60°C.
- debris is minimal and is not ejected beyond 1 metre.
- Debris consists principally of plastic fragments and inert composition elements.
- Residue is also minimal and usually consists of a small piece of burnt rubber sheet which will eventually be removed by passage of successive rail vehicles.
- the rail signal device of the present invention may be relocated indefinitely prior to use since it includes no consumable or deteriorating elements prior to use.
- the housing 10 may carry information such as date and place of manufacture together with a warning concerning the explosive nature of the device.
- the latter information may be conveniently applied to the housing by embossing the major surface portion 11 of the blister cup.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Percussive Tools And Related Accessories (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU816286 | 1986-09-24 | ||
AU8162/86 | 1986-09-24 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0262844A2 true EP0262844A2 (de) | 1988-04-06 |
EP0262844A3 EP0262844A3 (de) | 1989-07-12 |
Family
ID=3698831
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP87308293A Withdrawn EP0262844A3 (de) | 1986-09-24 | 1987-09-18 | Signalisierungseinrichtung |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP0262844A3 (de) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1996005095A1 (de) * | 1994-08-13 | 1996-02-22 | Ee-Signals Gmbh & Co. Kg | Verfahren zur erfassung von gefahrenquellen |
GB2358945A (en) * | 2000-02-04 | 2001-08-08 | Site Access Services Ltd | Fog signal attachment means |
WO2001056859A1 (en) * | 2000-02-04 | 2001-08-09 | Site Access Services Limited | Attachment means for a signalling device and method of identification |
GB2415076A (en) * | 2003-06-13 | 2005-12-14 | I P 21 Ltd | Rail track detonator |
GB2427953B (en) * | 2005-06-30 | 2009-06-03 | Systems & Solutions | Explosive warning assemblies |
US11021989B2 (en) | 2018-07-18 | 2021-06-01 | Raytheon Technologies Corporation | Environmental barrier multi-phase abradable coating |
US11866379B2 (en) | 2020-08-14 | 2024-01-09 | Rtx Corporation | Hafnon and zircon environmental barrier coatings for silicon-based components |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1388068A (en) * | 1921-05-24 | 1921-08-16 | Columbia Railway Signal Compan | Railway signal-torpedo |
DE959980C (de) * | 1941-04-30 | 1957-03-14 | Carl Brandmayer | Panzerbrechende Handmine |
FR2205435A1 (en) * | 1972-11-08 | 1974-05-31 | Canadian Ind | Railway track detonator signal - with plastics charge container and with anchoring system |
FR2406605A1 (fr) * | 1977-10-21 | 1979-05-18 | Banet Rivet Pierre | Procede et dispositif de recuperation d'un fluide contenu dans une enceinte submergee |
-
1987
- 1987-09-18 EP EP87308293A patent/EP0262844A3/de not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1388068A (en) * | 1921-05-24 | 1921-08-16 | Columbia Railway Signal Compan | Railway signal-torpedo |
DE959980C (de) * | 1941-04-30 | 1957-03-14 | Carl Brandmayer | Panzerbrechende Handmine |
FR2205435A1 (en) * | 1972-11-08 | 1974-05-31 | Canadian Ind | Railway track detonator signal - with plastics charge container and with anchoring system |
FR2406605A1 (fr) * | 1977-10-21 | 1979-05-18 | Banet Rivet Pierre | Procede et dispositif de recuperation d'un fluide contenu dans une enceinte submergee |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1996005095A1 (de) * | 1994-08-13 | 1996-02-22 | Ee-Signals Gmbh & Co. Kg | Verfahren zur erfassung von gefahrenquellen |
GB2358945A (en) * | 2000-02-04 | 2001-08-08 | Site Access Services Ltd | Fog signal attachment means |
WO2001056859A1 (en) * | 2000-02-04 | 2001-08-09 | Site Access Services Limited | Attachment means for a signalling device and method of identification |
GB2415076A (en) * | 2003-06-13 | 2005-12-14 | I P 21 Ltd | Rail track detonator |
GB2427953B (en) * | 2005-06-30 | 2009-06-03 | Systems & Solutions | Explosive warning assemblies |
US11021989B2 (en) | 2018-07-18 | 2021-06-01 | Raytheon Technologies Corporation | Environmental barrier multi-phase abradable coating |
US11952902B2 (en) | 2018-07-18 | 2024-04-09 | Rtx Corporation | Environmental barrier multi-phase abradable coating |
US11866379B2 (en) | 2020-08-14 | 2024-01-09 | Rtx Corporation | Hafnon and zircon environmental barrier coatings for silicon-based components |
Also Published As
Publication number | Publication date |
---|---|
EP0262844A3 (de) | 1989-07-12 |
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NTLES | INTERSTATE COMMERCE CO-< MIScION WASHINGTON |
Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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AK | Designated contracting states |
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17P | Request for examination filed |
Effective date: 19891229 |
|
18W | Application withdrawn |
Withdrawal date: 19900731 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
|
R18W | Application withdrawn (corrected) |
Effective date: 19900731 |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: AMES, MARTYN |